About Allosaurus fossils
Allosaurus is a genus of theropods, the mostly meat-eating group. The database records 6 species of it: Allosaurus amplus, Allosaurus anax, Allosaurus europaeus, Allosaurus fragilis, Allosaurus jimmadseni and Allosaurus lucasi.
The 147 finds on the map come from 4 countries. The United States has the most, with 137 (93%). Within the United States the most finds are in Wyoming (63), Colorado (39), Utah (17), New Mexico (8) and 3 more.
The rock formation with the most finds is called Morrison, with 137. The rocks are 161.5 to 137.1 million years ago, in the Jurassic and Cretaceous periods.
Extinct genus of theropod dinosaurs (Theropoda). (Description from Wikidata, CC0.)
Read about Allosaurus on Wikipedia.
- 147finds
- 4countries
- 161.5oldest, million years ago
- 137.1youngest, million years ago
Which countries have Allosaurus fossils?
| Country | Finds | Share |
|---|---|---|
| United States | 137 | 93% |
| Portugal | 8 | 5% |
| France | 1 | 1% |
| Germany | 1 | 1% |
US states
- Wyoming (63)
- Colorado (39)
- Utah (17)
- New Mexico (8)
- Oklahoma (4)
- Montana (3)
- South Dakota (3)
Rock formations that produced Allosaurus
A formation is a named body of rock. These are the ones with the most Allosaurus finds.
| Formation | Finds |
|---|---|
| Morrison | 137 |
| Alcobaça | 5 |
| Lourinhã | 3 |
| Lepidotus Beds | 1 |
Other dinosaurs found in United States
- Richardoestesia (239)
- Triceratops (166)
- Saurornitholestes (148)
- Paronychodon (141)
- Camarasaurus (138)
- Iguanodon (132)
- Troodon (103)
- Stegosaurus (86)
- Edmontosaurus (85)
- Tyrannosaurus (85)
More to explore
Before you go fossil hunting. A dot shows where a find was recorded, not where you may dig. Many fossil sites are on private or protected land and collecting rules differ by country. Check the rules before collecting and never dig on protected sites.
Questions about Allosaurus
Where was Allosaurus found?
Allosaurus fossils are recorded in the Paleobiology Database from United States, Portugal, France and Germany. Most of the 147 finds on this map (137) are from United States. The rock formation with the most finds is the Morrison (137).
How old are Allosaurus fossils?
Finds of Allosaurus on this map date from 161.5 to 137.1 million years ago, which is the Jurassic and Cretaceous periods. Ages are ranges, because rock layers are dated to a stage and not to a single year.
Where can I see Allosaurus fossils near me?
Open the map and press Near me to list the nearest dinosaur finds and the most notable dinosaurs found around you. Remember that a dot shows where scientists recorded a find, not where you can dig: many fossil sites are on private or protected land, so check the rules before collecting and never dig on protected sites.